You go on about how unstable the RAF is and then you state you don't
see a need for a horizontal stab. I flew an RAF without a stab for 85
hours and was about to get rid of it because of the nose pitching the
wrong way in drafts. I was then enlightened at www.rotaryforum.com and
added a stab. In fact, I started making them and sold over 30 of them.
That made it a completely different animal and I then went on to fly
almost 500 hours in it. Near the end, I had it converted to a
center-line-thrust Sparrowhawk configuration. I then got the hots for
a McCulloch J2 and sold it to get the J2.

Take a flight in a Sparrowhawk and you'll say that gyros are not hard
to fly. It's the instability of the stock RAF that makes it hard to
fly. I could have read a magazine and eaten a sandwich while flying
the stable version. Do yourself a favor and stop listening to the
aerodynamically-challenged CFIs of RAF and add a stab. You'll wonder
why you hesitated. Don't take my word for it, go to www.rotaryforum
and do a search on the RAF and stabs. The RAF in stock configuration
has killed more people in bunt-overs than I want to count. At the
least, a stab helps prevent this.